Attic hatches are one of the worst leaks in a home. During the Winter your warm, conditioned air that you are paying for, leaks around the perimeter of the hatch out of your home into the attic. And the inverse is true in Summer -- hot, humid outdoor air will push its way down into your living space making your cooling system work harder to cool your home. This is a great time to seal up your attic hatch and get it ready for the cold fronts moving in. If there are large gaps in your panel, cut a new one out of plywood for a nice tight fit. Next, glue several inches (the more the better) of ri...